I use stable isotope records from teeth and soils to study climate, vegetation, and mammalian ecology in the past and present. I'm working on reconstructing Pliocene-Pleistocene environments at fossil and archaeological localities in the Victoria basin, western Kenya. My primary goals are to understand environmental variability in the early Pleistocene as well as how long-term paleoenvironmental change differs across basins in eastern Africa. I'm particularly interested in understanding how shifts in hominin paleohabitats relate to behavioral variability. These studies are informed by ongoing work on the isotope ecology of modern analog environments. I'm also interested in primate ecology and the conservation of eastern African ecosystems. These projects involve a combination of fieldwork, museum sampling, and laboratory analysis.